Martin j



(No Model.) 2 Sheets-$hee1iLv M. J. MOSHER,

HUT AIR. FURNACE,

No. 370,807. Patented Oct. 4, 1887.

WITNESSES:

(No Model.) 2 Shets-Sheet 2.

M. J. MOSHER.

, HOT AIR FURNAGE.

No. 370,807. Patented Oct.. 4, 188'7.

UNITED STATES PATENT Urrrca.

MARTIN J. MOSHER, OF TROY, NEW YORK.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 370,807, dated October 4, 1887,

' Application filed September 30, 1886. Serial No. 214,9l8. (No model.)

To all whom it may concern.-

Be it known that I, MARTIN J. MOSHER, of the city of Troy, county of Rensselaer, State of New York, have invented new and useful Improvements in Hot-Air Furnaces, of which the following is a specification.

My invention relates to improvements upon hot-air furnaces, and more particularly to that class of them which are adapted to utilize by construction a current of air admitted into the combustion-chamber of the furnace above the burning fuel, the object and purpose of my invention being to utilize a current of air in the combustion-chamber to ignite the distilled gases coming from the fire, and to have this entering current of air protect a deflectingplate arranged in the combustionchamber above the fire, the said deflecting-plate serving to direct the heat and gases coming from the fire outwardly, where they will impinge upon the outer walls of the furnace-body to better heat the latter than when such gases and heat go directly to the exit.

Accompanying this specification, to form a part of it, there are two plates of drawings, containing three figures,illustrating my invention,

with the same designation of parts by letterreference used in all of them. Of theseillustrations, Figure l is a combinedside elevation and vertical section of the parts of a hotair furnace containing my invention, a part of the shell and the deflecting-plate being shown in side elevation, with the furnace-dome, the combustion-chamber, fire-cylinder, grate, ashpit, and with one of the air-conduit pipes leading to the deflecting-plate interior shown in cross-section. Fig. 2 is a plan view of the deflecting-plate and its hollow radial arms by which it is connected to't-he interior sides of the combustionchamber when in position therein. Fig. 3 is a cross-section taken on the line at w of Fig. 2.

The several parts of the furnace, as well as those of it containing my invention,are designated by letter-reference, and the function of theparts is described as follows:

The letter S designates the furnace-shell, which incloses a hot-air space, M, about the furnace proper. The letter D designates the dome of the furnace; 0, its combustion-cham- The letter D designates a deflecting-plate having a dish-formed bottom and top, with a hollow interior, a. This deflecting-plate has a series of radially-arranged arms, at, that are hollow and connect with itsinterior, and these arms rest on the combustion chamber wall, through which they pass, and thus support the deflecting-plate in position within the corn bastion-chamber.

The letters P designate pipes, each of which connects with one of the said hollow arms (1, and therefrom is extended downwardly and passed out of the shell and arranged to receive air from the room in which the furnace is placed; and the function of 'these pipes is to supply air to the interior of the deflectingplate, which under the draftimpulse of the furnace-chimney is drawn therefrom through the passage a made in the edge of said deflecting-plate,into the combustionchamber, where such air will ignite such of the gases as have been distilled from the fuel and have not been burned by the air entering up through thegrate.

The deflectingplate D serves, as thus placed, to deflect the heat and gases coming from the fire laterally to where they impinge against the inner face of the furnace-wall to heat the latter, so that it will radiate more heat into the space between the furnace-wall and the shell where the most of the furnace heat is utilized.

I am aware that air has been introduced into a combustion-chamber of a furnace above the fire, and I make no claim to the same apart from the application thatI make of it in combination with adefiecting-plate, where it performs the double office of protecting said plate and in doing this latter also ignites the gases.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

In a hot-air furnace, the combination, with the outer furnace-shell, S, the fire-shell, and the cold-airpipes P, arranged vertically at radial points within the hot-air space, of the deflector D consisting of two dish-shaped Signed at Troy, New York, this 4th day of plates arranged with their horizontal edges to August, 1886, and in the presence of the two form passages a, and formed with radial pipewitnesses whose names are hereto attached.

arms (1, projected through the fire-shell and MARTIN J. MOSHER. 5 supported thereby, and connected to the cold- Witnesses:

air pipes in the hot-air chamber, substantially- CHARLES S. BRINTNALL,

as described, and for the purpose stated. GEO. A. DARBY. 

